<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/logo.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主体区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区域 -->
                <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router>
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单的模板区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="item.icon"></i>
                            <!-- 文本 -->
                            <span>{{item.label}}</span>
                        </template>

                        <!-- 二级菜单 -->
                        <el-menu-item :index="subItem.url" v-for="subItem in item.children" :key="subItem.id">
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subItem.label}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧内容主体 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        data() {
            return {
                // 左侧菜单数据
                menulist: [],
                // 是否折叠
                isCollapse: false,
            }
        },
        created() {
            this.getMenuList()
        },
        methods: {
            logout() {
                window.sessionStorage.clear()
                this.$router.push('/login')
            },

            // 获取所有的菜单
            async getMenuList() {
                this.axios({
                    method: 'post',
                    url: 'ms/user/userPermission/getUserPermissions',
                    params: {userId: window.sessionStorage.getItem("userId")}
                }).then((res) => {
                    sessionStorage.setItem('routers', res.data.data.routers)
                    this.menulist = res.data.data.tree;
                })
            },

            // 点击按钮，切换菜单的折叠与展开
            toggleCollapse() {
                this.isCollapse = !this.isCollapse
            },
            // 保存链接的激活状态
            saveNavState(activePath) {
                window.sessionStorage.setItem('activePath', activePath)
                this.activePath = activePath
            }
        }
    }
</script>

<style lang="less" scoped>
    .home-container {
        height: 100%;
    }
    .el-header {
        background-color: #373d41;
        /*展示类型flex*/
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        /*按钮上下居中*/
        align-items: center;
        color: #fff;
        font-size: 20px;
        > div {
            /*文本上下居中*/
            display: flex;
            align-items: center;
            span {
                margin-left: 15px;
            }
        }
    }

    .el-aside {
        background-color: #333744;
        .el-menu {
            border-right: none;
        }
    }

    .el-main {
        background-color: #eaedf1;
    }

    .iconfont {
        margin-right: 10px;
    }

    .toggle-button {
        background-color: #4a5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
    }
</style>
